Please note: Fabrication services such as metal finishes will generally add to delivery time on your order.
 
As iron and steel are fragile in the environment, the most popular finish for them is corrosion protection through "galvanizing". We stock a variety of steel products as Pre Galvanized (Galvanized before manufacture.) and Hot Dip Galvanized. Most products that are stocked in Plain Steel can be sent out for Hot Dip Galvanizing.

Hot Dip Galvanizing is generally accomplished by two methods, both of which immerse or coat the metal with a liquid zinc bath after various processes. This protective coating is the interdiffusion of zinc and iron and will last for many years. However, if the product is to be cut, welded or otherwise fabricated-your product should be fabricated first, galvanized second.
 
Anodizing (clear)
 
Anodizing is an electrochemical process that forms a protective coating of aluminum oxide on the surface of aluminum. Aluminum oxide is a hard, durable, weather resistant substance. The coating is integral to the metal and cannot peel or flake. The coating may be colored by dyeing or may exhibit bronze tones through diffraction phenomena produced by the coating. If you want an aluminum product anodized, specify this in the comments box during the request quote process. Anodizing is only appropriate on certain aluminum alloys. Bronze anodizing is available for certain types of architectural applications.

All anodizing is available by special order.

Advantages of Anodizing

· Generally less expensive than painting
· Harder than PVDF, longer life, low maintenance
· Unaffected by sunlight
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Galvanizing
 
Pre Galvanized - Galvanizing takes place before the manufacture of the product. This generally results in a better appearance than Hot Dip Galvanizing.

Hot Dipped Galvanized - Hot Dip Galvanizing is generally accomplished by two methods, both of which immerse or coat the metal with a liquid zinc bath after various processes. This protective coating is the interdiffusion of zinc and iron and will last for many years. Hot Dip Galvanizing should take place after a product has been manufactured/fabricated, so that all the edges of the material are protected by the galvanic coating. If the product’s galvanic coating becomes scarred or scratched, generally some protection remains as the coating will corrode before the metal.

Advantages of Hot Dip Galvanizing
· More cost effective for long term
· Long service life
· Low maintenance
· Corrosion resistant - a protective coat of armor
· Less inspection required on job sites
· Self healing (scratches and cuts in coating)

Factors to consider when requesting Hot Dip Galvanizing
· Gauge of material - typically material should be 14 gauge or heavier - if in question, we will verify if your product can be galvanized.
· Openings in material - galvanizing will reduce the opening size of the material?with small holes, holes may close up. If open area is critical, be sure to start with an open area large enough to allow for the coating.
· Will product require further fabrication? If so, galvanize "after" the fabrication
· Will product require painting? If so, notify us so that the final galvanizing process (chromate quenching) is halted to allow for paint adherence.

Frequently Asked Questions
1. How can I repair galvanizing that has been cut or damaged?
Most repairs can be touched up by using paints containing zinc dust, sprayed zinc or zinc based solder.

2. Can galvanized iron or steel be painted?
Yes, using proven paint systems including a pretreatment primer or self primer. The galvanized steel surface, the demands of subsequent exposure and service need to be considered. Please consult a paint manufacturer for advice on the suitability of particular finishes for specific products and environments.

3. Does hot dip galvanizing affect the weight of my material?
Yes, the coating will add up to 10% additional weight.

Electrolytic Tin Coated - Steel coated with tin by electrolytic deposition. The coating is usually applied to a base metal having a dull surface texture. Please specify your requirements in the comment box. This process will add to the delivery time.

Electrogalvanized (ASTM A591) - A thin corrosion resistant zinc coating is applied to cold rolled steel, wire cloth, or other products by electroplating. The sheet of steel passes through a series of electrolytic cells that contain a zinc solution. The coating of zinc does not affect the weight-thickness relationship and is smooth. Electro-galvanizing is recommended as an undercoat for painted finishes. Please specify your requirements in the comment box. This process will add to the delivery time.

Galvannealed (A60) - Heat treated galvanized sheet, dull gray without spangles with a rough texture well suited to painting. Can withstand temperatures to 750 degrees without flaking. Less ductile than regular galvanized coating. Please specify your requirements in the comment box. This process will add to the delivery time.

Aluminized Steel (ASTM A463) - Sheet is hot dip coated on both sides with aluminum-silicon alloy by the continuous method leaving a satin finish. It provides the best qualities of aluminum and steel by resisting corrosion and providing strength at a low cost. Type I is provided in two weights, Regular and Light, and is principally for heat resisting applications where adherence is a prime factor. Type II is produced with one ounce per square foot coating and is used for applications where atmospheric corrosion resistance is the prime factor. Please specify your requirements in the comment box. This process will add to the delivery time.
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Mechanical Finishes
 
Deburring - This mechanical finishing process removes burrs and sharp edges from metal sheets, such as Expanded Metal. Please specify your requirements in the comment box. This process will add to the delivery time.

Degreasing - This mechanical finishing process removes grease and oil from sheets.

Leveling (Roller Leveling) - Leveling is a mechanical finishing process to flatten shape deficiencies such as wavy edges and buckles in a sheet of steel. Generally applies to expanded metal. An expanded metal sheet or pieces is made more uniformly flat without flattening the strands or bonds. Roller leveling can also be used on other sheet materials such as banding, to roll it into a curve for a Bar Grating shape requirement.

Sand Blasting - Sand Blasting is a mechanical finishing. There are several types of Sand Blasting. Basically, the surface is subjected to a stream of high velocity sand under air or steam pressure. The sand removes scale or encrusted material and creates a dark gray brushed appearance. Sand Blasting may be a good choice when there is a desire to improve the appearance of a standard mill finish. If you want a product sandblasted, specify this in the comments box during the request for quote process.
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Mebac
 
In the patented Mebac process, aluminum oxide grit is bonded to a metal base using a metal bonding agent. The surface can be applied on either a steel on steel or aluminum on aluminum base with various final finishes available. Steel based products are finished with a standard shop coat of paint applied to the underside surface. A galvanized finish can be applied over the entire surface when a steel bonding agent is specified. If you want a product supplied with a Mebac coating, specify this in the comments box during the request for quote process.

Mebac is available by special order.

Advantages of Mebac
· Slip resistant surface
· Corrosion resistant surface for oil, gas, alcohol and other chemicals
· High temperatures do not release toxic fumes or odors
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Mill Finish
 
Each product has a specific finish as it is produced in the mill. Generally mill finishes are not shiny or necessarily attractive, which should be considered if aesthetics are a concern. Mill finishes for specific products are listed below:

Expanded Metal Mill Finish - Products made from aluminum may need to be cleaned with a non etching chemical or detergent, then rinsed and dried thoroughly. A wax or non-wax base cleaner can be used. Products made from plain steel may be lightly oiled and should be cleaned before finishing. The most common cleaning method is an acid or solvent bath with a water rinse.

Bar Grating Mill Finish - Unless otherwise specified, stainless steel is supplied with a mill finish. The standard mill finish is gray and will have a discoloration of various colors (blue, black, brown, etc.) as a result of the heat generated in the welding process in manufacturing. If aesthetics are a concern, various types of Sandblasting are available to improve the appearance. Please specify your requirements in the comments box during the request for quote process. This process will add to the delivery time.
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Painting (Steel)
 
Painted Black - The surface is cleaned and then painted flat black. Painted products can be attractive and the paint provides some protection from weather. However, painted surfaces may not be the best choice for high traffic surfaces, as the paint may wear, exposing the metal underneath. If you want a product painted black, specify this in the comments box during the request quote process.

Red Oxide - Red Oxide is a traditional anticorrosive, weather resistant primer that contains zinc hydroxyl phosphite rust inhibitive pigment for added protection of steel. Red oxide primer contains no lead and is easily repainted. Suitable for use in a temperature at or above 302 degrees Fahrenheit. If you want a product treated with Red Oxide, specify this in the comments box during the request for quote process.

Powder Coating - Power Coating is a dry finishing method in which electrically charged particles of pigmented resins are sprayed onto a product. Electrical grounding of the coated object causes the charged powder to adhere to the surface. When baked in a curing oven the deposited powder melts and fuses together to form a continuous, cross-linked coating. Powder coating can be done in a spray booth and/or fluid bed. Part size and quantity require consideration. Powder coated finishes are attractive, uniform and highly resistant to corrosion, abrasion, cracking, etc. If you require powder coating, please check with local suppliers in your area.

"UV" Ultraviolet Coating - Typically a coating or property contained within the manufacturing of a product that reduces the effect of harmful and deteriorating ultraviolet light rays. Many of our products are UV resistant. Our Customer Service Specialists will be glad to help you with your requirements. Please note your request in the comments box during the request for quote process.
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